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980 lines
32 KiB
980 lines
32 KiB
// tuple_basic.hpp ----------------------------------------------------- |
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// Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi) |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// For more information, see http://www.boost.org |
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// Outside help: |
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// This and that, Gary Powell. |
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// Fixed return types for get_head/get_tail |
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// ( and other bugs ) per suggestion of Jens Maurer |
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// simplified element type accessors + bug fix (Jeremy Siek) |
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// Several changes/additions according to suggestions by Douglas Gregor, |
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// William Kempf, Vesa Karvonen, John Max Skaller, Ed Brey, Beman Dawes, |
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// David Abrahams. |
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// Revision history: |
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// 2002 05 01 Hugo Duncan: Fix for Borland after Jaakko's previous changes |
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// 2002 04 18 Jaakko: tuple element types can be void or plain function |
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// types, as long as no object is created. |
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// Tuple objects can no hold even noncopyable types |
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// such as arrays. |
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// 2001 10 22 John Maddock |
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// Fixes for Borland C++ |
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// 2001 08 30 David Abrahams |
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// Added default constructor for cons<>. |
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// ----------------------------------------------------------------- |
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#ifndef BOOST_TUPLE_BASIC_HPP |
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#define BOOST_TUPLE_BASIC_HPP |
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#include <utility> // needed for the assignment from pair to tuple |
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#include "boost/type_traits/cv_traits.hpp" |
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#include "boost/type_traits/function_traits.hpp" |
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#include "boost/utility/swap.hpp" |
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#include "boost/detail/workaround.hpp" // needed for BOOST_WORKAROUND |
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namespace boost { |
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namespace tuples { |
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// -- null_type -------------------------------------------------------- |
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struct null_type {}; |
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// a helper function to provide a const null_type type temporary |
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namespace detail { |
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inline const null_type cnull() { return null_type(); } |
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// -- if construct ------------------------------------------------ |
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// Proposed by Krzysztof Czarnecki and Ulrich Eisenecker |
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template <bool If, class Then, class Else> struct IF { typedef Then RET; }; |
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template <class Then, class Else> struct IF<false, Then, Else> { |
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typedef Else RET; |
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}; |
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} // end detail |
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// - cons forward declaration ----------------------------------------------- |
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template <class HT, class TT> struct cons; |
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// - tuple forward declaration ----------------------------------------------- |
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template < |
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class T0 = null_type, class T1 = null_type, class T2 = null_type, |
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class T3 = null_type, class T4 = null_type, class T5 = null_type, |
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class T6 = null_type, class T7 = null_type, class T8 = null_type, |
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class T9 = null_type> |
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class tuple; |
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// tuple_length forward declaration |
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template<class T> struct length; |
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namespace detail { |
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// -- generate error template, referencing to non-existing members of this |
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// template is used to produce compilation errors intentionally |
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template<class T> |
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class generate_error; |
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template<int N> |
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struct drop_front { |
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template<class Tuple> |
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struct apply { |
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typedef BOOST_DEDUCED_TYPENAME drop_front<N-1>::BOOST_NESTED_TEMPLATE |
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apply<Tuple> next; |
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typedef BOOST_DEDUCED_TYPENAME next::type::tail_type type; |
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static const type& call(const Tuple& tup) { |
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return next::call(tup).tail; |
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} |
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}; |
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}; |
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template<> |
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struct drop_front<0> { |
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template<class Tuple> |
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struct apply { |
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typedef Tuple type; |
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static const type& call(const Tuple& tup) { |
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return tup; |
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} |
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}; |
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}; |
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} // end of namespace detail |
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// -cons type accessors ---------------------------------------- |
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// typename tuples::element<N,T>::type gets the type of the |
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// Nth element ot T, first element is at index 0 |
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// ------------------------------------------------------- |
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#ifndef BOOST_NO_CV_SPECIALIZATIONS |
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template<int N, class T> |
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struct element |
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{ |
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE |
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apply<T>::type::head_type type; |
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}; |
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template<int N, class T> |
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struct element<N, const T> |
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{ |
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private: |
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE |
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apply<T>::type::head_type unqualified_type; |
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public: |
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#if BOOST_WORKAROUND(__BORLANDC__,<0x600) |
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typedef const unqualified_type type; |
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#else |
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typedef BOOST_DEDUCED_TYPENAME boost::add_const<unqualified_type>::type type; |
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#endif |
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}; |
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#else // def BOOST_NO_CV_SPECIALIZATIONS |
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namespace detail { |
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template<int N, class T, bool IsConst> |
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struct element_impl |
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{ |
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE |
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apply<T>::type::head_type type; |
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}; |
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template<int N, class T> |
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struct element_impl<N, T, true /* IsConst */> |
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{ |
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE |
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apply<T>::type::head_type unqualified_type; |
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typedef const unqualified_type type; |
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}; |
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} // end of namespace detail |
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template<int N, class T> |
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struct element: |
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public detail::element_impl<N, T, ::boost::is_const<T>::value> |
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{ |
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}; |
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#endif |
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// -get function templates ----------------------------------------------- |
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// Usage: get<N>(aTuple) |
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// -- some traits classes for get functions |
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// access traits lifted from detail namespace to be part of the interface, |
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// (Joel de Guzman's suggestion). Rationale: get functions are part of the |
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// interface, so should the way to express their return types be. |
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template <class T> struct access_traits { |
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typedef const T& const_type; |
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typedef T& non_const_type; |
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typedef const typename boost::remove_cv<T>::type& parameter_type; |
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// used as the tuple constructors parameter types |
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// Rationale: non-reference tuple element types can be cv-qualified. |
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// It should be possible to initialize such types with temporaries, |
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// and when binding temporaries to references, the reference must |
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// be non-volatile and const. 8.5.3. (5) |
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}; |
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template <class T> struct access_traits<T&> { |
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typedef T& const_type; |
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typedef T& non_const_type; |
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typedef T& parameter_type; |
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}; |
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// get function for non-const cons-lists, returns a reference to the element |
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template<int N, class HT, class TT> |
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inline typename access_traits< |
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typename element<N, cons<HT, TT> >::type |
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>::non_const_type |
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get(cons<HT, TT>& c BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) { |
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE |
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apply<cons<HT, TT> > impl; |
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typedef BOOST_DEDUCED_TYPENAME impl::type cons_element; |
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return const_cast<cons_element&>(impl::call(c)).head; |
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} |
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// get function for const cons-lists, returns a const reference to |
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// the element. If the element is a reference, returns the reference |
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// as such (that is, can return a non-const reference) |
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template<int N, class HT, class TT> |
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inline typename access_traits< |
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typename element<N, cons<HT, TT> >::type |
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>::const_type |
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get(const cons<HT, TT>& c BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) { |
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE |
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apply<cons<HT, TT> > impl; |
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typedef BOOST_DEDUCED_TYPENAME impl::type cons_element; |
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return impl::call(c).head; |
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} |
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// -- the cons template -------------------------------------------------- |
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namespace detail { |
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// These helper templates wrap void types and plain function types. |
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// The reationale is to allow one to write tuple types with those types |
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// as elements, even though it is not possible to instantiate such object. |
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// E.g: typedef tuple<void> some_type; // ok |
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// but: some_type x; // fails |
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template <class T> class non_storeable_type { |
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non_storeable_type(); |
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}; |
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template <class T> struct wrap_non_storeable_type { |
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typedef typename IF< |
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::boost::is_function<T>::value, non_storeable_type<T>, T |
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>::RET type; |
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}; |
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template <> struct wrap_non_storeable_type<void> { |
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typedef non_storeable_type<void> type; |
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}; |
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} // detail |
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template <class HT, class TT> |
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struct cons { |
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typedef HT head_type; |
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typedef TT tail_type; |
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typedef typename |
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detail::wrap_non_storeable_type<head_type>::type stored_head_type; |
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stored_head_type head; |
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tail_type tail; |
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typename access_traits<stored_head_type>::non_const_type |
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get_head() { return head; } |
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typename access_traits<tail_type>::non_const_type |
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get_tail() { return tail; } |
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typename access_traits<stored_head_type>::const_type |
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get_head() const { return head; } |
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typename access_traits<tail_type>::const_type |
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get_tail() const { return tail; } |
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cons() : head(), tail() {} |
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// cons() : head(detail::default_arg<HT>::f()), tail() {} |
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// the argument for head is not strictly needed, but it prevents |
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// array type elements. This is good, since array type elements |
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// cannot be supported properly in any case (no assignment, |
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// copy works only if the tails are exactly the same type, ...) |
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cons(typename access_traits<stored_head_type>::parameter_type h, |
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const tail_type& t) |
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: head (h), tail(t) {} |
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template <class T1, class T2, class T3, class T4, class T5, |
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class T6, class T7, class T8, class T9, class T10> |
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cons( T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, |
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T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 ) |
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: head (t1), |
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tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull()) |
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{} |
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template <class T2, class T3, class T4, class T5, |
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class T6, class T7, class T8, class T9, class T10> |
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cons( const null_type& /*t1*/, T2& t2, T3& t3, T4& t4, T5& t5, |
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T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 ) |
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: head (), |
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tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull()) |
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{} |
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template <class HT2, class TT2> |
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cons( const cons<HT2, TT2>& u ) : head(u.head), tail(u.tail) {} |
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template <class HT2, class TT2> |
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cons& operator=( const cons<HT2, TT2>& u ) { |
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head=u.head; tail=u.tail; return *this; |
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} |
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// must define assignment operator explicitly, implicit version is |
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// illformed if HT is a reference (12.8. (12)) |
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cons& operator=(const cons& u) { |
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head = u.head; tail = u.tail; return *this; |
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} |
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template <class T1, class T2> |
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cons& operator=( const std::pair<T1, T2>& u ) { |
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BOOST_STATIC_ASSERT(length<cons>::value == 2); // check length = 2 |
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head = u.first; tail.head = u.second; return *this; |
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} |
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// get member functions (non-const and const) |
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template <int N> |
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typename access_traits< |
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typename element<N, cons<HT, TT> >::type |
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>::non_const_type |
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get() { |
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return boost::tuples::get<N>(*this); // delegate to non-member get |
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} |
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template <int N> |
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typename access_traits< |
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typename element<N, cons<HT, TT> >::type |
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>::const_type |
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get() const { |
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return boost::tuples::get<N>(*this); // delegate to non-member get |
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} |
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}; |
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template <class HT> |
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struct cons<HT, null_type> { |
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typedef HT head_type; |
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typedef null_type tail_type; |
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typedef cons<HT, null_type> self_type; |
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typedef typename |
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detail::wrap_non_storeable_type<head_type>::type stored_head_type; |
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stored_head_type head; |
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typename access_traits<stored_head_type>::non_const_type |
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get_head() { return head; } |
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null_type get_tail() { return null_type(); } |
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typename access_traits<stored_head_type>::const_type |
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get_head() const { return head; } |
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const null_type get_tail() const { return null_type(); } |
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// cons() : head(detail::default_arg<HT>::f()) {} |
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cons() : head() {} |
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cons(typename access_traits<stored_head_type>::parameter_type h, |
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const null_type& = null_type()) |
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: head (h) {} |
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template<class T1> |
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cons(T1& t1, const null_type&, const null_type&, const null_type&, |
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const null_type&, const null_type&, const null_type&, |
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const null_type&, const null_type&, const null_type&) |
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: head (t1) {} |
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cons(const null_type&, |
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const null_type&, const null_type&, const null_type&, |
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const null_type&, const null_type&, const null_type&, |
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const null_type&, const null_type&, const null_type&) |
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: head () {} |
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template <class HT2> |
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cons( const cons<HT2, null_type>& u ) : head(u.head) {} |
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template <class HT2> |
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cons& operator=(const cons<HT2, null_type>& u ) |
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{ head = u.head; return *this; } |
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// must define assignment operator explicitely, implicit version |
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// is illformed if HT is a reference |
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cons& operator=(const cons& u) { head = u.head; return *this; } |
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template <int N> |
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typename access_traits< |
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typename element<N, self_type>::type |
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>::non_const_type |
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get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) { |
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return boost::tuples::get<N>(*this); |
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} |
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template <int N> |
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typename access_traits< |
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typename element<N, self_type>::type |
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>::const_type |
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get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) const { |
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return boost::tuples::get<N>(*this); |
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} |
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}; |
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// templates for finding out the length of the tuple ------------------- |
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template<class T> |
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struct length { |
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BOOST_STATIC_CONSTANT(int, value = 1 + length<typename T::tail_type>::value); |
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}; |
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template<> |
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struct length<tuple<> > { |
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BOOST_STATIC_CONSTANT(int, value = 0); |
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}; |
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template<> |
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struct length<tuple<> const> { |
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BOOST_STATIC_CONSTANT(int, value = 0); |
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}; |
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template<> |
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struct length<null_type> { |
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BOOST_STATIC_CONSTANT(int, value = 0); |
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}; |
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template<> |
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struct length<null_type const> { |
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BOOST_STATIC_CONSTANT(int, value = 0); |
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}; |
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namespace detail { |
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// Tuple to cons mapper -------------------------------------------------- |
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template <class T0, class T1, class T2, class T3, class T4, |
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class T5, class T6, class T7, class T8, class T9> |
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struct map_tuple_to_cons |
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{ |
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typedef cons<T0, |
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typename map_tuple_to_cons<T1, T2, T3, T4, T5, |
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T6, T7, T8, T9, null_type>::type |
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> type; |
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}; |
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// The empty tuple is a null_type |
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template <> |
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struct map_tuple_to_cons<null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type> |
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{ |
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typedef null_type type; |
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}; |
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} // end detail |
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// ------------------------------------------------------------------- |
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// -- tuple ------------------------------------------------------ |
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template <class T0, class T1, class T2, class T3, class T4, |
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class T5, class T6, class T7, class T8, class T9> |
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class tuple : |
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public detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type |
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{ |
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public: |
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typedef typename |
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detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type inherited; |
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typedef typename inherited::head_type head_type; |
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typedef typename inherited::tail_type tail_type; |
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// access_traits<T>::parameter_type takes non-reference types as const T& |
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tuple() {} |
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tuple(typename access_traits<T0>::parameter_type t0) |
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: inherited(t0, detail::cnull(), detail::cnull(), detail::cnull(), |
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detail::cnull(), detail::cnull(), detail::cnull(), |
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detail::cnull(), detail::cnull(), detail::cnull()) {} |
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tuple(typename access_traits<T0>::parameter_type t0, |
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typename access_traits<T1>::parameter_type t1) |
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: inherited(t0, t1, detail::cnull(), detail::cnull(), |
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detail::cnull(), detail::cnull(), detail::cnull(), |
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detail::cnull(), detail::cnull(), detail::cnull()) {} |
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tuple(typename access_traits<T0>::parameter_type t0, |
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typename access_traits<T1>::parameter_type t1, |
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typename access_traits<T2>::parameter_type t2) |
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: inherited(t0, t1, t2, detail::cnull(), detail::cnull(), |
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detail::cnull(), detail::cnull(), detail::cnull(), |
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detail::cnull(), detail::cnull()) {} |
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tuple(typename access_traits<T0>::parameter_type t0, |
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typename access_traits<T1>::parameter_type t1, |
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typename access_traits<T2>::parameter_type t2, |
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typename access_traits<T3>::parameter_type t3) |
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: inherited(t0, t1, t2, t3, detail::cnull(), detail::cnull(), |
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detail::cnull(), detail::cnull(), detail::cnull(), |
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detail::cnull()) {} |
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tuple(typename access_traits<T0>::parameter_type t0, |
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typename access_traits<T1>::parameter_type t1, |
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typename access_traits<T2>::parameter_type t2, |
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typename access_traits<T3>::parameter_type t3, |
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typename access_traits<T4>::parameter_type t4) |
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: inherited(t0, t1, t2, t3, t4, detail::cnull(), detail::cnull(), |
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detail::cnull(), detail::cnull(), detail::cnull()) {} |
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tuple(typename access_traits<T0>::parameter_type t0, |
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typename access_traits<T1>::parameter_type t1, |
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typename access_traits<T2>::parameter_type t2, |
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typename access_traits<T3>::parameter_type t3, |
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typename access_traits<T4>::parameter_type t4, |
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typename access_traits<T5>::parameter_type t5) |
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: inherited(t0, t1, t2, t3, t4, t5, detail::cnull(), detail::cnull(), |
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detail::cnull(), detail::cnull()) {} |
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tuple(typename access_traits<T0>::parameter_type t0, |
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typename access_traits<T1>::parameter_type t1, |
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typename access_traits<T2>::parameter_type t2, |
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typename access_traits<T3>::parameter_type t3, |
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typename access_traits<T4>::parameter_type t4, |
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typename access_traits<T5>::parameter_type t5, |
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typename access_traits<T6>::parameter_type t6) |
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: inherited(t0, t1, t2, t3, t4, t5, t6, detail::cnull(), |
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detail::cnull(), detail::cnull()) {} |
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tuple(typename access_traits<T0>::parameter_type t0, |
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typename access_traits<T1>::parameter_type t1, |
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typename access_traits<T2>::parameter_type t2, |
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typename access_traits<T3>::parameter_type t3, |
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typename access_traits<T4>::parameter_type t4, |
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typename access_traits<T5>::parameter_type t5, |
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typename access_traits<T6>::parameter_type t6, |
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typename access_traits<T7>::parameter_type t7) |
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: inherited(t0, t1, t2, t3, t4, t5, t6, t7, detail::cnull(), |
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detail::cnull()) {} |
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tuple(typename access_traits<T0>::parameter_type t0, |
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typename access_traits<T1>::parameter_type t1, |
|
typename access_traits<T2>::parameter_type t2, |
|
typename access_traits<T3>::parameter_type t3, |
|
typename access_traits<T4>::parameter_type t4, |
|
typename access_traits<T5>::parameter_type t5, |
|
typename access_traits<T6>::parameter_type t6, |
|
typename access_traits<T7>::parameter_type t7, |
|
typename access_traits<T8>::parameter_type t8) |
|
: inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, detail::cnull()) {} |
|
|
|
tuple(typename access_traits<T0>::parameter_type t0, |
|
typename access_traits<T1>::parameter_type t1, |
|
typename access_traits<T2>::parameter_type t2, |
|
typename access_traits<T3>::parameter_type t3, |
|
typename access_traits<T4>::parameter_type t4, |
|
typename access_traits<T5>::parameter_type t5, |
|
typename access_traits<T6>::parameter_type t6, |
|
typename access_traits<T7>::parameter_type t7, |
|
typename access_traits<T8>::parameter_type t8, |
|
typename access_traits<T9>::parameter_type t9) |
|
: inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9) {} |
|
|
|
|
|
template<class U1, class U2> |
|
tuple(const cons<U1, U2>& p) : inherited(p) {} |
|
|
|
template <class U1, class U2> |
|
tuple& operator=(const cons<U1, U2>& k) { |
|
inherited::operator=(k); |
|
return *this; |
|
} |
|
|
|
template <class U1, class U2> |
|
tuple& operator=(const std::pair<U1, U2>& k) { |
|
BOOST_STATIC_ASSERT(length<tuple>::value == 2);// check_length = 2 |
|
this->head = k.first; |
|
this->tail.head = k.second; |
|
return *this; |
|
} |
|
|
|
}; |
|
|
|
// The empty tuple |
|
template <> |
|
class tuple<null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type> : |
|
public null_type |
|
{ |
|
public: |
|
typedef null_type inherited; |
|
}; |
|
|
|
|
|
// Swallows any assignment (by Doug Gregor) |
|
namespace detail { |
|
|
|
struct swallow_assign; |
|
typedef void (detail::swallow_assign::*ignore_t)(); |
|
struct swallow_assign { |
|
swallow_assign(ignore_t(*)(ignore_t)) {} |
|
template<typename T> |
|
swallow_assign const& operator=(const T&) const { |
|
return *this; |
|
} |
|
}; |
|
|
|
|
|
} // namespace detail |
|
|
|
// "ignore" allows tuple positions to be ignored when using "tie". |
|
inline detail::ignore_t ignore(detail::ignore_t) { return 0; } |
|
|
|
// --------------------------------------------------------------------------- |
|
// The call_traits for make_tuple |
|
// Honours the reference_wrapper class. |
|
|
|
// Must be instantiated with plain or const plain types (not with references) |
|
|
|
// from template<class T> foo(const T& t) : make_tuple_traits<const T>::type |
|
// from template<class T> foo(T& t) : make_tuple_traits<T>::type |
|
|
|
// Conversions: |
|
// T -> T, |
|
// references -> compile_time_error |
|
// reference_wrapper<T> -> T& |
|
// const reference_wrapper<T> -> T& |
|
// array -> const ref array |
|
|
|
|
|
template<class T> |
|
struct make_tuple_traits { |
|
typedef T type; |
|
|
|
// commented away, see below (JJ) |
|
// typedef typename IF< |
|
// boost::is_function<T>::value, |
|
// T&, |
|
// T>::RET type; |
|
|
|
}; |
|
|
|
// The is_function test was there originally for plain function types, |
|
// which can't be stored as such (we must either store them as references or |
|
// pointers). Such a type could be formed if make_tuple was called with a |
|
// reference to a function. |
|
// But this would mean that a const qualified function type was formed in |
|
// the make_tuple function and hence make_tuple can't take a function |
|
// reference as a parameter, and thus T can't be a function type. |
|
// So is_function test was removed. |
|
// (14.8.3. says that type deduction fails if a cv-qualified function type |
|
// is created. (It only applies for the case of explicitly specifying template |
|
// args, though?)) (JJ) |
|
|
|
template<class T> |
|
struct make_tuple_traits<T&> { |
|
typedef typename |
|
detail::generate_error<T&>:: |
|
do_not_use_with_reference_type error; |
|
}; |
|
|
|
// Arrays can't be stored as plain types; convert them to references. |
|
// All arrays are converted to const. This is because make_tuple takes its |
|
// parameters as const T& and thus the knowledge of the potential |
|
// non-constness of actual argument is lost. |
|
template<class T, int n> struct make_tuple_traits <T[n]> { |
|
typedef const T (&type)[n]; |
|
}; |
|
|
|
template<class T, int n> |
|
struct make_tuple_traits<const T[n]> { |
|
typedef const T (&type)[n]; |
|
}; |
|
|
|
template<class T, int n> struct make_tuple_traits<volatile T[n]> { |
|
typedef const volatile T (&type)[n]; |
|
}; |
|
|
|
template<class T, int n> |
|
struct make_tuple_traits<const volatile T[n]> { |
|
typedef const volatile T (&type)[n]; |
|
}; |
|
|
|
template<class T> |
|
struct make_tuple_traits<reference_wrapper<T> >{ |
|
typedef T& type; |
|
}; |
|
|
|
template<class T> |
|
struct make_tuple_traits<const reference_wrapper<T> >{ |
|
typedef T& type; |
|
}; |
|
|
|
template<> |
|
struct make_tuple_traits<detail::ignore_t(detail::ignore_t)> { |
|
typedef detail::swallow_assign type; |
|
}; |
|
|
|
|
|
|
|
namespace detail { |
|
|
|
// a helper traits to make the make_tuple functions shorter (Vesa Karvonen's |
|
// suggestion) |
|
template < |
|
class T0 = null_type, class T1 = null_type, class T2 = null_type, |
|
class T3 = null_type, class T4 = null_type, class T5 = null_type, |
|
class T6 = null_type, class T7 = null_type, class T8 = null_type, |
|
class T9 = null_type |
|
> |
|
struct make_tuple_mapper { |
|
typedef |
|
tuple<typename make_tuple_traits<T0>::type, |
|
typename make_tuple_traits<T1>::type, |
|
typename make_tuple_traits<T2>::type, |
|
typename make_tuple_traits<T3>::type, |
|
typename make_tuple_traits<T4>::type, |
|
typename make_tuple_traits<T5>::type, |
|
typename make_tuple_traits<T6>::type, |
|
typename make_tuple_traits<T7>::type, |
|
typename make_tuple_traits<T8>::type, |
|
typename make_tuple_traits<T9>::type> type; |
|
}; |
|
|
|
} // end detail |
|
|
|
// -make_tuple function templates ----------------------------------- |
|
inline tuple<> make_tuple() { |
|
return tuple<>(); |
|
} |
|
|
|
template<class T0> |
|
inline typename detail::make_tuple_mapper<T0>::type |
|
make_tuple(const T0& t0) { |
|
typedef typename detail::make_tuple_mapper<T0>::type t; |
|
return t(t0); |
|
} |
|
|
|
template<class T0, class T1> |
|
inline typename detail::make_tuple_mapper<T0, T1>::type |
|
make_tuple(const T0& t0, const T1& t1) { |
|
typedef typename detail::make_tuple_mapper<T0, T1>::type t; |
|
return t(t0, t1); |
|
} |
|
|
|
template<class T0, class T1, class T2> |
|
inline typename detail::make_tuple_mapper<T0, T1, T2>::type |
|
make_tuple(const T0& t0, const T1& t1, const T2& t2) { |
|
typedef typename detail::make_tuple_mapper<T0, T1, T2>::type t; |
|
return t(t0, t1, t2); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3> |
|
inline typename detail::make_tuple_mapper<T0, T1, T2, T3>::type |
|
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3) { |
|
typedef typename detail::make_tuple_mapper<T0, T1, T2, T3>::type t; |
|
return t(t0, t1, t2, t3); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4> |
|
inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type |
|
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, |
|
const T4& t4) { |
|
typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type t; |
|
return t(t0, t1, t2, t3, t4); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4, class T5> |
|
inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type |
|
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, |
|
const T4& t4, const T5& t5) { |
|
typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type t; |
|
return t(t0, t1, t2, t3, t4, t5); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6> |
|
inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6>::type |
|
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, |
|
const T4& t4, const T5& t5, const T6& t6) { |
|
typedef typename detail::make_tuple_mapper |
|
<T0, T1, T2, T3, T4, T5, T6>::type t; |
|
return t(t0, t1, t2, t3, t4, t5, t6); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6, |
|
class T7> |
|
inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7>::type |
|
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, |
|
const T4& t4, const T5& t5, const T6& t6, const T7& t7) { |
|
typedef typename detail::make_tuple_mapper |
|
<T0, T1, T2, T3, T4, T5, T6, T7>::type t; |
|
return t(t0, t1, t2, t3, t4, t5, t6, t7); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6, |
|
class T7, class T8> |
|
inline typename detail::make_tuple_mapper |
|
<T0, T1, T2, T3, T4, T5, T6, T7, T8>::type |
|
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, |
|
const T4& t4, const T5& t5, const T6& t6, const T7& t7, |
|
const T8& t8) { |
|
typedef typename detail::make_tuple_mapper |
|
<T0, T1, T2, T3, T4, T5, T6, T7, T8>::type t; |
|
return t(t0, t1, t2, t3, t4, t5, t6, t7, t8); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6, |
|
class T7, class T8, class T9> |
|
inline typename detail::make_tuple_mapper |
|
<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type |
|
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, |
|
const T4& t4, const T5& t5, const T6& t6, const T7& t7, |
|
const T8& t8, const T9& t9) { |
|
typedef typename detail::make_tuple_mapper |
|
<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type t; |
|
return t(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9); |
|
} |
|
|
|
namespace detail { |
|
|
|
template<class T> |
|
struct tie_traits { |
|
typedef T& type; |
|
}; |
|
|
|
template<> |
|
struct tie_traits<ignore_t(ignore_t)> { |
|
typedef swallow_assign type; |
|
}; |
|
|
|
template<> |
|
struct tie_traits<void> { |
|
typedef null_type type; |
|
}; |
|
|
|
template < |
|
class T0 = void, class T1 = void, class T2 = void, |
|
class T3 = void, class T4 = void, class T5 = void, |
|
class T6 = void, class T7 = void, class T8 = void, |
|
class T9 = void |
|
> |
|
struct tie_mapper { |
|
typedef |
|
tuple<typename tie_traits<T0>::type, |
|
typename tie_traits<T1>::type, |
|
typename tie_traits<T2>::type, |
|
typename tie_traits<T3>::type, |
|
typename tie_traits<T4>::type, |
|
typename tie_traits<T5>::type, |
|
typename tie_traits<T6>::type, |
|
typename tie_traits<T7>::type, |
|
typename tie_traits<T8>::type, |
|
typename tie_traits<T9>::type> type; |
|
}; |
|
|
|
} |
|
|
|
// Tie function templates ------------------------------------------------- |
|
template<class T0> |
|
inline typename detail::tie_mapper<T0>::type |
|
tie(T0& t0) { |
|
typedef typename detail::tie_mapper<T0>::type t; |
|
return t(t0); |
|
} |
|
|
|
template<class T0, class T1> |
|
inline typename detail::tie_mapper<T0, T1>::type |
|
tie(T0& t0, T1& t1) { |
|
typedef typename detail::tie_mapper<T0, T1>::type t; |
|
return t(t0, t1); |
|
} |
|
|
|
template<class T0, class T1, class T2> |
|
inline typename detail::tie_mapper<T0, T1, T2>::type |
|
tie(T0& t0, T1& t1, T2& t2) { |
|
typedef typename detail::tie_mapper<T0, T1, T2>::type t; |
|
return t(t0, t1, t2); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3> |
|
inline typename detail::tie_mapper<T0, T1, T2, T3>::type |
|
tie(T0& t0, T1& t1, T2& t2, T3& t3) { |
|
typedef typename detail::tie_mapper<T0, T1, T2, T3>::type t; |
|
return t(t0, t1, t2, t3); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4> |
|
inline typename detail::tie_mapper<T0, T1, T2, T3, T4>::type |
|
tie(T0& t0, T1& t1, T2& t2, T3& t3, |
|
T4& t4) { |
|
typedef typename detail::tie_mapper<T0, T1, T2, T3, T4>::type t; |
|
return t(t0, t1, t2, t3, t4); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4, class T5> |
|
inline typename detail::tie_mapper<T0, T1, T2, T3, T4, T5>::type |
|
tie(T0& t0, T1& t1, T2& t2, T3& t3, |
|
T4& t4, T5& t5) { |
|
typedef typename detail::tie_mapper<T0, T1, T2, T3, T4, T5>::type t; |
|
return t(t0, t1, t2, t3, t4, t5); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6> |
|
inline typename detail::tie_mapper<T0, T1, T2, T3, T4, T5, T6>::type |
|
tie(T0& t0, T1& t1, T2& t2, T3& t3, |
|
T4& t4, T5& t5, T6& t6) { |
|
typedef typename detail::tie_mapper |
|
<T0, T1, T2, T3, T4, T5, T6>::type t; |
|
return t(t0, t1, t2, t3, t4, t5, t6); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6, |
|
class T7> |
|
inline typename detail::tie_mapper<T0, T1, T2, T3, T4, T5, T6, T7>::type |
|
tie(T0& t0, T1& t1, T2& t2, T3& t3, |
|
T4& t4, T5& t5, T6& t6, T7& t7) { |
|
typedef typename detail::tie_mapper |
|
<T0, T1, T2, T3, T4, T5, T6, T7>::type t; |
|
return t(t0, t1, t2, t3, t4, t5, t6, t7); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6, |
|
class T7, class T8> |
|
inline typename detail::tie_mapper |
|
<T0, T1, T2, T3, T4, T5, T6, T7, T8>::type |
|
tie(T0& t0, T1& t1, T2& t2, T3& t3, |
|
T4& t4, T5& t5, T6& t6, T7& t7, |
|
T8& t8) { |
|
typedef typename detail::tie_mapper |
|
<T0, T1, T2, T3, T4, T5, T6, T7, T8>::type t; |
|
return t(t0, t1, t2, t3, t4, t5, t6, t7, t8); |
|
} |
|
|
|
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6, |
|
class T7, class T8, class T9> |
|
inline typename detail::tie_mapper |
|
<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type |
|
tie(T0& t0, T1& t1, T2& t2, T3& t3, |
|
T4& t4, T5& t5, T6& t6, T7& t7, |
|
T8& t8, T9& t9) { |
|
typedef typename detail::tie_mapper |
|
<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type t; |
|
return t(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9); |
|
} |
|
|
|
template <class T0, class T1, class T2, class T3, class T4, |
|
class T5, class T6, class T7, class T8, class T9> |
|
void swap(tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& lhs, |
|
tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& rhs); |
|
inline void swap(null_type&, null_type&) {} |
|
template<class HH> |
|
inline void swap(cons<HH, null_type>& lhs, cons<HH, null_type>& rhs) { |
|
::boost::swap(lhs.head, rhs.head); |
|
} |
|
template<class HH, class TT> |
|
inline void swap(cons<HH, TT>& lhs, cons<HH, TT>& rhs) { |
|
::boost::swap(lhs.head, rhs.head); |
|
::boost::tuples::swap(lhs.tail, rhs.tail); |
|
} |
|
template <class T0, class T1, class T2, class T3, class T4, |
|
class T5, class T6, class T7, class T8, class T9> |
|
inline void swap(tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& lhs, |
|
tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& rhs) { |
|
typedef tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> tuple_type; |
|
typedef typename tuple_type::inherited base; |
|
::boost::tuples::swap(static_cast<base&>(lhs), static_cast<base&>(rhs)); |
|
} |
|
|
|
} // end of namespace tuples |
|
} // end of namespace boost |
|
|
|
|
|
#endif // BOOST_TUPLE_BASIC_HPP |
|
|
|
|
|
|